Locking device



` Dec. 21 ,1926.

M. COHN LOCKING DEVICE vFiled August 22 1925 vwentoz WORK/5 Cog/v Patented Dec. 5.2i, i925,

tira sr arer MGRBIS OGEN, Oh BRGOKLYN, NEW' YGRK.

Locarno nnvrcn. Y

Application ed August 22, 1925.

This invention relates to locking,l devices and in particular to the application of a lock to a door or like latch.

A. particular object of the invention isto provide a lock in combination with latch belts or bars which will render said latch bars in locked position within a keeper plate.

i further object of the invention is to provide means whereby the usual door latch may be converted into a lock, the use of the lock in no way interfering with the operation of the latch as such. v

fi. still further object is to provide in a latch an anti-jimmy locking member, so

that jimmying of the door is prevented byl forcing the door away from the frame.

Referringr to the drawing,` wherein i have shown a preferred embodiment of my invention Figure l is a view in elevation, a part thereof being shown in section of a lock constructed in accordance with my invention,

Figure 2 is a section taken on the line 22 of Figure 1, and shows the interior mechanism of the lock,

Figure 3 is an enlarged section in elevation taken on the line 3--3 of Figure 2 and shows the position of the locking bolts within the latch bar,

Figure t is an enlarged view in side elevation of the locking' head showing the lock bolts in contact therewith, the locking position of said head being` shown in outline.

Figure is a section taken on the line 5--5 of Figure 4 and shows the shape of the locking head and the lock bolts and Figure 6 is an enlargedview in perspective showing the general shape and arrangement of the locking head and bolts.

Referring to the drawing in detail 5 indicates a portion of the door, and 6 a portion of the door frame, into the latter of which is secured in the usual manner the keeper plate 7 which is provided with a front opening 8, which registers with a lock opening' 9 in the front face 10 of a latch housing 11. Through this opening 9 there extends the usual latch bar 12 having at its forward end the enlarged head 13 which is provided with a vertically disposed square bore 14, which opens to the exterior at the side of the bolt as at 15 and from which opens the space 16 which allows for an advanced movement of the locking member hereinafter referred to. This latch bar 12 Serial No. 51,736.

is substantially the saine as the bars in present day use in latches, and is suitably positioned within the housingn 10, and is normally maintained in its advanced position through the medium of the spring 17, there boingprovided in the lower edgeof said latch bar the cutout i8, which is engaged by the linger 19 carried on a revolvable sleeve 20, the sleeve itself being journaled in the sides 21 of the latch housing and having passed therethrough the knob holding rod 23, at the ends of which arey disposedthc knobs 211 shown in outline in Figure2.

When the door is slammed the latch head 13 snaps over the edge of the keeper plate aganst the tension of the spring 17 and can then only be released by a turning ofthe knobs, all of. which is as usual inwprcsent latch construction. ln order to lock the latch within the keeper plate, i provide a lock housing 25 on the latch bar by rivet ing, soldering or otherwise. This housingcontains the extended portion 26 of a locking head, the portion-26 being` cutout as at 27 to provide a key engaging slot, the housingl 25 itself being provided with the usual key opening 28, so that when a key is inserted into said key hole and revolved, the locking head 29 which is formed on the end of the extended portion 26 is reciprocated. This locking head 29 is wedge shaped in formation and at its cent-re is provided with a horizontal iiange 30 to the sides of which are cast v rtical flanges or guide ways 31 as shown in Figure 6. rlhese flanges 31 provide grooves The locking' head is disposed within the openingl of the latch head 13 in position to normally engage the slotted ends 33 of the locking bolts Sek The slotted ends ofthe locking1 bolts are ci course adapted to receive the flanges 31 which l sliding movement therethrough, the lockingI bolts 34 themselves being,q slidably retained in the vertical bores 1li, of the latch head 1? hereinbefore referred to.

It is evident therefore shown in Figure 3 that a movement of the locking' head 29 in the direction shown by the arrow will result in a raising` and lowering of the upper and lower looting` bolts respectively, so that their ends will project beyond the top and bottom edges of the latch head 13 and will prevent retraction of said latch head by any movement of the knobs 24. in order to release the latch head, it is therefore necessarv to retract the locking head 29 which will piu draw the bolts towards each otherl through the medium of the cam action afforded by the Wedge shaped locking head.

Inasmuch as the bolts are always in engagement with the locking head, they cannot Jfall out ot the latch head 13 and are positively operated, thereby preventing anyone from separating the bolts from the latch head to release the latter.

In order to allow for the latching movement of the latch bar While a key is lett in the lock housing 25, I provide in the latch housing 10 an elongated slot 35.

Therefore under normal condition the latch may b'e used simply as a latch to retain the door closed and When it is desired to lock the door the locking head 29 is manipulated through the medium of a key to securely lock the latch head 13 Within the keeper plate 17.

It is to be understood any type of keeper plate might be employed, that is one having ring members at the top and bottom thereof into Which the locking bolt could extend when in locked position.

It is evident therefore that I have `provided an improved combination latch and lock, which will eliminate most of the complicated mechanism heretofore necessary in providing an ordinary latch member with a lock7 and also l have provided a lock Which is rendered jimmy-proof by reason of the fact that the locking element does not ex tend across the opening between the door and the door frame, and can therefore not be tampered therewith as is the case in the ordinary locking bolt.

Having described my invention what 1 claim is:

A locking device comprising a latch member, a keeper plate into which said latch member is adapted to snap, a forwardly tapering locli'ng head slidably mounted on and lockingly and unloclingly operable independently 01" said latch, a houshaving a key hole in one face thereot lined to the latch member, a plurality ci: tapering flanges on the locking heath and a plurality of locking bolts slidably mounted on said anges passing through the latch member" and co-operating With said locking head to maintain the latch in locked position within the keeper plate.

MORRIS CO1' N. 

